Anyone? Should i use a bushing or reducer for my chamber (going from 4" chamber to 1/2" valve)

And i should be using a reducer for reducing the size of pipe, right?

bigbob12345 wrote:By bosning do you mean bushing

I don't know.. But it's highly possible :thumbright: Maybe these pictures will help..

YAY!! I found something! Now I can start building.. But there is something called a muff (word?) and a "bøsning" (word?). Both are reduction pipes, but the "bøsning" is cheaper (wtf ?). What's the difference (except for the price)?

I pretty much can't find anything here in Denmark.. Do any of you know where i can buy parts online?
EDIT: Forget it!! I'm going to build one out of soda bottles instead.. what's the pressure rating for those??

Thanks for the replies, and sorry for the stupid question 8) . I live in Denmark, and they don't really have everything in the stores, so i didn't know that you could get a threaded PVC pipe. And I don't know what a "sprinkler valve" is in danish, so i probably can't get it.. I'll have to go with ...

This might be a stupid question, but here it goes:
After looking at a lot of spudgun videos on YouTube, I thought I'd make my own one. But while making the plans, I realised that i had a metal ball valve, and I didn't know how to weld it to PVC. I don't even know if it is possible. So, should I ...